I've certainly felt like this. Whether we like it or not, we've all been through an experience in which we've experienced altered perceptions, heavy rumination and constant anxiety. These are traumatic and life-changing experiences, no doubt about it.
For me, I've accepted that I'm in a transition phase in my life. I believe we tend to go through smaller transitions every 6 months or so, but we tend to go through larger transition phases once every 5-10 years. It helps to look back on your last 10 years of life. For me, I've found that I changed all the time without really thinking about it. The person I was at 16 is totally different to who I was at 18. The person I was at 18 is nothing like who I am now at 25. Similarly, the person I am now at 25 (suffering from DP/DR and transitioning) will be nothing like the person I am at 28.
It's the one constant in life - things change all the time. You need to find peace in the fact that you are a different person now, for our experiences change us every day. You're still a human and you haven't lost the things your defining features (name, DOB, physical appearance etc.), but your identity is always changing. Be at peace with this change, it is natural and unavoidable. It is one of humanity's greatest faults that we latch on to ideas of stagnation and rigidity, when instead the universe changes around us on every level and at all times. Relinquish control and go with the flow - you'll feel better for it.